Cocoanut-oil barge.



A. MACDONALD.

COCOANUT OIL BARGE.,

APPLICATION FILED JULY l5. 1918.

vPatented Nov. 12, 1918.

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ALAN MACDONALD, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO SAN FRANCISCO SHIP BUILDING C0., OF SAN FRANCISCO, CALIFORNIA, A CORPORATION OF CALI- FOB/NIA.

COCOAN'UT-OIL BARGE.

Application iled July 15, 1918.

To all whom t may concern:

Be it known that I, ALAN MACDONALD, a citizen of the nited States, residing at the city and county of San Francisco and State of California, have invented certain new and useful Improvements in Cocoanut- @il Barges, of which the following is a specification.

My invention relates to barges and other floating vessels for carrying vegetable-oils, principally c0coanut-oil.

It is customary in oil-Ibarges or tank steamers to fill the holds of the vessels with the oil, so that the liquid is in contact with the outside plating of the ship. Vegetable oils, such for example, as cocoanut cil which solidiiies at a relatively high temperature, about G0 degrees Fahrenheit, required to be heated at'the end of the voyage, so that the oil cargo may be unloaded with pumps.

This heating is customarily done by means of steam pipes or coils in the bottom of the vessel, immersed in the oil. This practice is unsatisfactory, due to the danger of overheating the oil, the expense of the coils and their maintenance, the diiiiculty of cleaning the compartments, and above all, the damage to the oil!` in case of steam leaks.

Moreover, in contemplating the use of reinforced concrete barges and vessels as oil carriers, the fact that contact of the oil with the concrete has a damaging effect on the latter, must be taken in consideration.

It is therefore apparent that with concrete vessels the customary practice of filling the hull directly with oil is impracticable and this together with the disadvantages of the usual heating by means of immersed steam pipes, makes it a matter of importance, especially with concrete hulls, to so store the oil that it shall not be in contact with the concrete and also that such storage shall be 0f a character adapted both for inspection for oil leaks and for the use of a more effective and less damaging means or method of heating the oil in order to liquefy it so that it may be discharged by pumping. These are the objects in view and though my invention is applicable to barges and vessels of wood, steel or any material, it is especially applicable to and advantageous in concrete vessels and barges, in which connection, for the sake of demonstrating its full advisability, I shall describe it, not

Specification of Letters Patent.

'of their concrete environment.

Patented Nov. 12, 1918.

serial No. 244,907.

limiting myself, however, to such concrete vessels, except in so far as specifically claimed.

In the accompanying drawings,

Figure 1 is a longitudinal section on the line 1-1 of Fig. 2.

Fig. 2 is a top plan View, with the deck partly broken away.

1 is the concrete hull of the barge, 2 is the concrete deck, and 3 are the concrete bulkheads, which are here shown as dividing the hull into four tanlccompartments, though this number may be varied as required.

In each compartment is a tank 4 of steel. These tanks rise to and fit closelyup under the deck, but they are of such diameters or lateral dimensions as to leave a clear space between their walls and the inner surfaces They are also set up on blocks 5 so that a space is left 1lfaletveen their bottoms and the bottom of the In the several bulkheads are made the apertures 6. r

In an end compartment of the barge are assembled the following r-7 is a boiler in which steam is generated. The steam is carried in a pipe 8 to an engine 9 which drives a fan 10, and said steam is thence carried into a steam coil 11 in an air box 12 said air box receiving the delivery iiue 13 from the fan and discharging into the first tank compartment through an opening 14. From the last tank compartment a flue 15, leads back to the fan.

Air is driven by the fan 10 into the box 12 and is therein heated by the steam-heated coil 11. From the box 12 the heated air circulates through all the tank compartments, as shown by the arrows and returns to the fan. In its course it passes beneath the tanks and heats their contents, this bottom contact being most effective.

By this arrangement of enveloping spaces, sides and bottom, especially the latter, it is possible to heat the oil from the, exterior-` thereby avoiding the dangers of the customary method of heating by steam pipes immersed in the oil, and though this arrangement is advantageous in any hull regardless of the material of which it is made, it has the special advantage in concrete hulls of keeping the oil out of contact with the concrete. It lalso has the advantage of perv 'through the compartments; oil tanks in the compartments separated from thevbottom of the compartments; means to circulate air through the vcompartments .under vthe :oil

tanks; and ',means to vheat the-air.

2. A barge or other lioating vessel, .having bulkheads dividing the same yinto compartments, said bulkheads having openings therein to provide for the'circulation of air through the compartments;;0il tanks in the compartments separated fromathe sides and bottom of the compartments; means to cir culate air through the compartments around the oil tanks; and vmeans toheatthe air.

3. A concrete .barge kor fother concrete floating vessel having ybulkheads dividing the same into compartments, said bulkheads VCopies of -this patent ymaybe obtained for .same into compartments, said bulkheads having openings therein to provide for the circulation of air through the compartments;oil tanks in the compartments separated from the sides and bottom of the compartments; means to circulate air Ythrough the-compartments around the oil tanks; and means-to heat the air.

`In testimony whereof -I have signed my name to this specification in the presence of two subscribing Witnesses.

ALAN MACDONALD.

WVitnesses:

WM. F. BooTH, `13.513. RICHARDS.

ve cents each, by .addressing the Commissioner of Patents,

Wnhington,.D.,C. 

